ML20115B503
| ML20115B503 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 03/07/1985 |
| From: | Tucker H DUKE POWER CO. |
| To: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| SD-414-84-24, NUDOCS 8504180037 | |
| Download: ML20115B503 (2) | |
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DUKE POWER GOMPANY P.O. BOX 33189
^ CHARLOTTE, N.C. 28942 HAL B. TUCKER
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.vum emessent c 8C Mi. -
J rc 7, 1985
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Dr. J. Nelson Grace, Regional' Administrator-U. S. Nuclear Regulatory Commission
. Region II 101 Marietta Street,.NW, Suite 2900 l Atlanta, Georgia. 30323
.Re: ~ Catawba Nucicar Station, Unit 2.
Docket.No.;50-414,
Significant~DefjciencyNo. 414/84-24' s
Dear'Dr.. Grace:
Please. find attached a supplemental response to this deficiency concerning contaminated piping. This information is being submitted at the request of Resident Inspector P.'K. Van Doorn.
'Very truly yours,
'k.$.h fhW Hal B.' Tucker LTP: sib
' Attachment cc: Director Palmetto Alliance Office of Inspection and Enforcement 21351s Devine Street
--U. S. Nuclear Regulatory Conunission Columbia, South Carolina 29205
-Washington, D. C.
20555 Robert Guild, Esq.
NRC Resident Inspector
'P. O. Box 12097 Catawba Nuclear Station Charleston, South Carolina 29412 Mr. Jesse L. Riley Carolina Environmental Study Group 854 Henley Place
-Charlotte, North' Carolina '28207 INPO Records Center Suite 1500
.1100 circle 75 Parkway Atlanta, Georgia 30339 D
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s Supplemental Responsa i
SD 414/8?-24
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f This -is 'supplem6stal"information concerning SD 414/84-24 which invol),e9
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'ofl9ontamination of the NI, NC, and ND systems.
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q, Non6oriforming heia ; Report 19085 has been resolved, all actions are complete, (6
and is currently b.eing reviewed. The coitrective actions involved extensivw.
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rework which included the following:
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Initially, 26 walds on 3/4" and 1" pipe were cut out to identify tite potentially contarinated systems and their boundaries.
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Once the boundaries had been'. established,' approximately 42 permanent welds on pipe ranging in sizeifrom 3/4" to 8" were cut to' allow for flush-pipe connections.
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0f 18 inetrument loops that were potentiAlly contaminated, a sample
- of five' loops found no contamination.
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107 mechanical valves were cleaned [b'y flus'a., 25 of these were dis-[
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assembled and verified to be clean rubsequent' to flush.
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Two sof t seat valves,were disassembleilyand hand cleaned.
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- 6.. The following items were hand cleanedt
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.s A. Reactor vessel '
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All four hot and cold legs
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Pressurizer surge'line'
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12" ND lines in B and C hot. legs E.
10" NI line to cold legs 3
Of the 'itsas which were hand l cleaned, 33 patph. tests were performed T,
and accepted.~
An investigs. tion was also performed to determine the lan;;th of *.ime involved in this situation and respansibility for this problem occurritig. A review of test.
f,s ing records abwed that the temporary construction air to the NI' system was not turned on until a(ter Septeinber 20,' 1984. The oil was discovered on October 15,7 1984 so. this situation remained undetected for approximately 25 days. Upod re'r-
. forming the reVidt of the. hose connection, we havn. concluded that this was. an~
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Isolated human itr ;.
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